How do I convert System.Drawing into windows.graphics.imaging ?

I'm not sure you really needs that, as it would be better to do it all in WPF in first place. However, there are cases when it would be really needed.

First approach would be: save System.Drawing.Bitmap to memory stream, and then read System.Windows.Media.Imaging.BitmapImage from the same stream. You can find some code sample here: http://stackoverflow.com/questions/2440267/interopbitmap-to-bitmapimage[^].

I'm afraid this sample is not the most optimal. You can do it in a bit different way, without using two different streams: rewind the first stream to the beginning, and than use the same stream again in WPF BitmapImage:

dImg.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
ms.Seek(0, SeekOrigin.Begin);
//...

See also:
http://msdn.microsoft.com/en-us/library/system.io.memorystream.aspx[^],
http://msdn.microsoft.com/en-us/library/system.io.memorystream.seek.aspx[^],
http://msdn.microsoft.com/en-us/library/883dhyx0.aspx[^].

The problem with this approach is that it depends on detail of persistent presentation of bitmap, such as compression. It may need too much memory space for non-compressed formats, or else compression can compromise image quality. The better approach is using System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap
http://msdn.microsoft.com/en-us/library/system.windows.interop.imaging.createbitmapsourcefromhbitmap%28v=vs.110%29.aspx[^].

For some code sample, please see: http://stackoverflow.com/questions/94456/load-a-wpf-bitmapimage-from-a-system-drawing-bitmap[^].

—SA

z3m wrote:

Exactly I want to split video file into multiple images. Please see if you can help me with that.

I would advise to use open-source library or utility FFmpeg or libavcodec: http://en.wikipedia.org/wiki/Ffmpeg[^],
http://ffmpeg.org/[^],
http://en.wikipedia.org/wiki/Libavcodec[^],
http://libav.org/[^].

This is the best library and utility set I ever knew. I does what you need, plus a lot more things. I could be used just by running the available utility (FFmpeg.exe), programmatically or not, using command-line interface.

Optionally, you can embed is as a library. It's apparently possible with C++, as the library is written on C. Same thing if you need .NET functionality: you can still use the unmanaged library, using it in your C++/CLI mixed-mode (managed + unmanaged) project. You can expose just the functionality you need, in managed "ref" classes; then you can use these classes referencing the resulting module as a usual .NET assembly.

With .NET and without C++/CLI, it can be more complex as it would require using P/Invoke. At the same time, you can find appropriate wrapper. Please see:
http://www.ffmpeg-csharp.com/[^],
http://sourceforge.net/projects/sharpffmpeg/[^],
http://vbffmpegwrapper.codeplex.com/[^].

After all, try to find some more: http://bit.ly/VpboUJ[^].

If you wish to work at such wrapper by yourself but don't know how, ask a question, I'll give you the basic ideas (using P/Invoke or C++/CLI "mixed-mode" project).

Good luck,

—SA